Dec 18 (Reuters) - On the Chinese tropical island of Hainan, Huanghuali trees - a rare kind of rosewood - are being photographed so that they can be turned into digital assets. Huanghuali or "yellow flowering pear" produces wood with a beautiful lustre and golden sheen. Favoured by Chinese emperors in times past, the wood continues to be highly prized. But a tree takes ​decades to mature, testing the patience of farmers. Converting the Huanghuali into real world asset (RWA) tradeable tokens would bring ...